Multiple drill head



Mar. 2(0), 11923. m4493164 J. F. EUHR l MULTI PLE DRILL HEAD Filed Dec. 6, 1920 4 sheets-sheet 1 qui" Mam'. 2(1), E923.

J. F. EUHR MULTIPLE DRILL HEAD 4 sheets-sheet 2 Filed Dec. 6, 1920 MM2@ 1923. LMQM@ v J. F. EUHR MULTIPLE DRILL HEAD Filed Dec. 6, 1920 4 sheets-shee1, 5 I

Marr. 20), 31923. Y 31,449,164

J. F. Bul-m MULTIPLE DRILL HEAD Filed Dec. 6, 19'20 4 sheets-sheet 4 Fatentedllt/lar. 2G), 11923.

NETE@ STATES carece.,

JSEIPH 1F. EUHR, Oli? DTROIT, MICHIGAN'.

MULTEPLE DRILL HEAD.

Application led December 6,1920. Serial No. 428,565.

To all whom t may concern:

Be it known that l, JOSEPH' F. BURR, a citizen of the United States of America, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful lmprovements in Multiple Drill Heads, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to a multiple drill head and has special reference to that class of drill heads having a multiplicity of adjustable drills, bits or other boring instrumentalities that may be operated in synchronism from a single master driven spindle. A

My invention aims to provide a multiple drill head embodying transmission housings and socket members, the transmission housings being adjustable relative to the power transmission mechanism and the socket members adjustable relative to the transmission housings. It is therefore possible to position the socket members in any desired relation relative to vone another within the limits of the drill head and by such an arrangement a piece of work may be expeditiously and economically operated upon with absolute accuracy.

My invention also aims to provide a multiple drill head having adjustable transmission housings and socket members wherein provision is made for maintaining -a lubricant in said transmission housings and the socket members to insure ease of operation without waste of lubricant due to any adjustments lof the transmission housings and socket members.

The above and other results are attained by a mechanical construction which'has been put into practice and found satisfactory, and this construction has been shown in the aecompanying drawings, wherein Figure 1 is a bottom plan of the multiple drill head;

Fig. 2 is a hor1zontal sectional view of the drill head on a smaller Scale; showing the power vtransmission mechanism;

Fig.'3 is a similar view on a larger scale showing` the transmission housings;

Fig. 4 is a vertical sectional view of a portion of the drill head taken -on or about the line liv-1V of Fig. 2;

Fig. 5 is a vertical sectional view of a modified form of adapter iEor the drill head,

Fig. 6 is a similar view olf a further modied form of adapter. Reference willirst be had to Fig. 4 showing the preferred form of adapter in connection with the drill head and the reference numeral 1 denotes a sleeve member adapted to form part of a drilling. machine, the f' sleeve member being arranged for vertical adjustment so that a drill head supported therefrom mayv be raised and lowered relative to a piece of work. The lower end of 'the sleeve member-'has an integral flange 2 and adjustable against said flange and centered by the lower end of the sleeve member 1 is a transition casing 3 which is adapt-j.

ed to be iixed relative to the flange 2 by clamping members -l attached to the casing 3 by screw bolts 5 cr other fastening means, said `clamping members overhanging the fla-nge 2 and adapted to be clamped in engagement therewith when the screw bolts 5 are tightened.

The transmission casing 3 has its lower endV provided with a flange 6 and connected to said ange by screw bolts 7 or other fastening means `is a cylindrical drill head 8 provided with a top wall 9 and a bottom wall 10, said bottom wall being detachable and normallyv held in place by screws 11 or other fastening means. The top wall 9 of the head 8 is formed with a central seat 12 and' a collar 13 axially alining with a collar 14C of the bottom plate 10 and these collars will provide clearance for a center drill or socket should it be desired to use the same. In the collars 13 and 14 is a bushing 15 and a closure 16, the latter being removed when the former accommodates a center drill or socket.

Mounted in the seat 12 is an anti-frictional radial bearing 17 for a center gear 18 which has the upper end of its hub journaled in an opening 19 provided therefor in the top wall of the casing 3. The center gear 18 is mountedbn the shank 20 of a 'tapered adapter 21 extending into a drive spindle 22 journaledpin the sleeve member 1, and when a. center drill is placed in the collars 13 and or shank extend into the center gear 18, so'

Vthat said center gear will serve functionally as a coupling member to permit of power being tratted direct to the center drill from the drive spindle 21. A

Mounted in the top wall o the casing 3 and the top wall 9 of the head 8 are pins o 'provided with bushings 24 of intermediate gears which mesh with the center gear 18, said intermediate gears being preferablytwo in number and diametricallyopposed, as best shown in F ig. 2. Three intermediate gearsmay be used for a sin spindle drill head `{six intermediate gears for a twelve spindle head. Provision is made for oiling the intermediate gears by ports 26 in said gears andthe bushings thereof, and the entire interior of the transmission casing may be iilled with a suitable lubricant to insure easy running ot the transmission mechanism therein.V

'lhe top wall 9 of the head 8 has a plurality of large openings 2'? with packing 28 in the opening walls, and journaled in said openings are transmission housings 29 which l communicate with the casing 3 to receive sion mechanism mgs 29.` The compound gears are supported portions 4l, said upper lubricant A10 of the head 8.

therefrom. The transmission housings 29 are retained in the head 8 for adjustment therein bv pivot pins 30 having the upper ends thereof seated in the top wall of the casing 3 and the lower ends thereof extending through the housings 29 into the bottom plate l0. The pivot pins 30 are axially of the transmission housings 29 so that said housings may be swung about said pins, and rotatable on each pin is a compound gear composed of gears 3l and 32. The gears 31 mesh with the intermediate gears 25 and cooperate with said intermediate gears and the center gear 18 in providing a transmission mechanism within the casing 3, so thatr power may be transmitted from the' adapter 21 through the transmisto the gears 32 in the housby suitable bushings 33 and lubricant is supplied to the pivot pins 30 through ports 34 communicating with the housings 29 and the casing 3. Y v

The transmission housings 29 have offset provided with packing 36 and anti-frictional' radial bearings 37 for compound gears within the oifset portions 35 of the housings 29 and socket members 38 adjustably supported against the bottom plate Each compound gear is in the form of a lower gear 39 having an elongated hub '40 provided with an upper gear gear meshing with the gear 32 in each housingv 29. Extending through 'each compoundgear is -a suspension or pivot bolt 42 which has its upper end seated on the offset portion 3501iz each housing 29 and its lower end extending through an offset portion 43 of the socket member 29, said offset portion containing anti-frictional radial bearings 44 for the gear 39 therein. On the lower end of the lsuspension or pivot bolt 42 is a nut 45 and by tightening said nut the socket member may be clamped against the bottom plate l0 of the -head 8.

With the compound gear and the pivot bolt 'extending out of the head 8 into the the arcs of said slot.

socket member 38 it is necessary that the bottom plate l0 of the head 8 be provided with segment shaped slots 46, best shown in F ig. 3,.said slots being described on arcs having for their'renters the pivot pins 3U. The slots 46 are suitably spaced apart in the bottom plate 10 so that adjustment of one of the transmission housings 29 will not interfere with ust-ment oi' others.

Journaled in each socket member is a socket 47 supportedv therein by anti-frictional radial and end thrust bearings 48 and on each socket is a gear wheel 49 meshing with the gear wheel 39 within the offset portion 43 oi the socket member. Each socket may be provided with a suitable drill or boring instrumentality* Y ln addition to the suspension or pivot bolts 42 being employed for clamping the socket members 38 against the head 8 there 5l adjustable in segment shaped grooves in the lower face of the bottom wall l0, said grooves being described on greater arcs than the slots 46 but having the same centers as The clamping members V50 extend under ianges 53 on the upper ends otl the socket members 38, as best shown in F ig. l, and with said clamping members 50 and the nuts 45 loose the socket members 38 may be swung about the pivotbolts 42 as axes, such adjustment being independent of theV swinging adjustment of the transmission housings 29 within the head 8. Of course, while the clamping members 50 and the nuts 45 are loose the transmission housings 29 can be adjusted. within the head 8v and by tightening the nuts 45 the pivot bolts 42 will simultaneously7 clamp the housings 29 and the socket members 38 to the bottom wall l0 of the drill head. lVhile the pivotbolts 42 may be depended upon to hold the transmission housings 29 the clamping members 5() are used as additional means .to hold the socket members 38.

By reference toFigs. l and 3 it will be noted that the sockets 47 may be swung in and out relative to the axis of the adapter 21 and still be driven from said adapter. It is possible to place the sockets 47 in proximity to each other when drilling holes that are close together or by adjusting the transmission housings far as possible relative to the slots 46 and then swinging the socket members 38 outwardly it is possible to drill holes that are very far apart. Furthermore, since Vthe transmission housings and the socket members are adjustable independently of adjacent housings or members it is possible to drill holes that are irregularly spaced and it is this particular kind of work Where my improved multiple drill head can be used to an advantage.

Considering other improvements, the drill head 8 has side enlargements 53a which perchines it is necessary that in 'order for a drillbearing 65.

ing head to be universal that it be equipped with adapters of various styles permitting of the drilling head bein used in connection with any drilling mac ine. Some of these adapters have been shown in Figs. 5 and 6,

and in Fig. 5 the adapter or drive spindle 54 is cylindrical and is journaled in a bushing set in a sleeve member 56 which has a detachable iiange 57. Thecenter gear 18 is keyed or otherwise mounted on the adapter or drive spindle 54 and an anti-frictional end thrust bearing 58 is installed between the lower end of the sleeve member 56 and a collar 59 on the adapter or spindle 54. This view of the drawing also illustratesl how the shank or tang 60 of a center drill may be coupled to the adapter or spindle 54. i

'ln Fig. 6 the drive spindle is designated 61 and is journaled in the sleeve member 62 .having its lower end enlarged to aiiord anv enclosure 63 and a ange 64, the enclosure accommodating an anti-friction end thrust An adapter 66, similar to the adapter 21, extends' into the drive spindle 61 y and couples said drive spindle to the center gear'18. In this instance the center gear has an anti-frictional end thrust bearing -67 *seated in the top wall of the transmission casing 3.

What l claim isz--v 1. In a drill head, a sleeve member, a drive spindle therein an adjustable transmission casing connected to said sleeve meinber, ,a head connected to said casing and having a slotted bottom wall, adjustable transmission housings in said head communicating withsaid casing and adapted to receive lubricant therefrom, adjustable socket members below said head, and having portions thereof extending through the slotted bottom wall of said head, sockets in said socket membersmea,ns carried by said transmission housings to prevent lubricant from passing from said housing through the slotted bottom wall of said head, and means in said socket members, said transmission housings and. casing operated from said drive spindle for rotating said sockets.

2. In a drill headhaving a slotted bottom wall, suspension bolts extending through the slots of said wall, socket members carried by said bolts against said wall and adapted to be fixed relative to said wall by tightening said bolts, sockets in said Socket members, and means in said head and about said sus' pension bolts for imparting movement to said sockets.

3. A drill head as in claim 2, wherein adsaid suspension bolts to prevent leakage of lubricant from said housings, socket members adapted to swing abo-ut .said bolts, sockets in said socket members7 and means about said pins and bolts adapted to impart movement to said sockets.

5. A drill head as in claim 4, characterized by said suspension bolts being constructively arranged to Simultaneously lock said housings and socket members against movement.

6. In a drill head, axial power transmission means, a transmission housing having centers in definedrelation to the axis of the drill head, said transmission housings having offset portions adapted to swing relative to the centers of said housings, socket members having 'offset portions supported from the offset portions o-f'said housings and constructively arranged to swing relative to the axes of the oset portions, sockets in said socketvmembers and means maintained fin position at the centers of said housings and socket members and the o'set portions thereof for transmitting power to said sockets from said power vtransmission means.

7. A drill head having a slotted bottom wall, a pivoted transmission housing in said head and having an offset portion, a socket member outside of the bottom wall Ao said head and having an oset portion connected through the slot of said bottom wall, to the offset portion of said housing, a socket in said socket member, and power transmission means from said transmission housing to said socket. Y

8. A drill head as characterized in claim 7, wherein said power transmission means is about the connection between said transmission housing and said socket member.

ln testimony whereof l afhxrmy signature in presence of two witnesses.

Witnesses:

ANNA M. Donn, KARL H. Bomen.

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